gistfile1.c

int incomingByte = 0;
int ledPin = 13;
void setup(){
  Serial.begin(9600);
  pinMode(ledPin,OUTPUT);
}
void loop(){
  if(Serial.available() > 0){
    incomingByte = Serial.read();
    
    if(incomingByte == 116){
      Serial.println("Blinky");      
      digitalWrite(ledPin,HIGH);
      delay(1000);
      digitalWrite(ledPin,LOW);  
    }
  }
}